Since then,he has developed another bad habit.这句为什么用现在完成时?

He has lived here since 1992为什么是现在完成时而不是现在完成时进行时 He has caught a bad cold since last week改错 英语 补充句子Tom has a bad habit.He h_____ to wash hands. Jack has a bad eating habit.He doesn't like carrots,cabbages He has lived here since 1992.这里为什么用has lived而不用has been livi jim has been studying since he come home 为什么用since China has developed..since 1978 and has made great progress 谁知道英语题：China has developed[ ]since 1978[rapid]用正确形式填 现在完成时的问题：and now he has just bought another garge Three years has passed since he came to China.中为什么用has 英语翻译Since then he has tried to honor her memory as best he c since 后面用现在完成时?